▎ 摘　　要

NOVELTY - Preparing graphene and titanium oxide nano composite material involves subjecting graphene aerogel and the titanium source to a self-assembly reaction in the presence of a soft template, a chelating agent, and a reaction solvent. The product is solidified and calcined to provide a nanocomposite material. The titanium source is titanium dioxide. The soft template is a diblock copolymer polystyrene-block-poly(ethylene oxide) (PS-PEO). The chelating agent is acetylacetone. USE - Method for preparing graphene and titanium oxide nano composite material used as a gas sensitive material in a gas sensor (claimed). ADVANTAGE - The method can effectively improve the gas-sensing performance of the material, and effectively improve its sensing ability and gas-sensitive response ability, and gas sensor prepared shows excellent response performance to different gases, and at the same time has excellent stability and recovery characteristics.